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Proceedings Paper

Red and infrared light distribution in blood
Author(s): Ana Carolina de Magalhães; Elisabeth M. Yoshimura
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Paper Abstract

Low level laser therapy (LLLT) is used in several applications, including the reduction of inflammatory processes. It might be used to prevent the systemic inflammatory response syndrome (SIRS), which some patients develop after cardiopulmonary bypass (CPB) surgery. The objectives of this study were to investigate light distribution inside blood, in order to implement the LLLT during CPB, and, through this study, to determine the best wavelength and the best way to perform the treatment. The blood, diluted to the same conditions of CPB procedure was contained inside a cuvette and an optical fiber was used to collect the scattered light. Two wavelengths were used: 632.8 nm and 820 nm. Light distribution in blood inside CPB tubes was also evaluated. Compared to the 820 nm light, the 632.8 nm light is scattered further away from the laser beam, turning it possible that a bigger volume of blood be treated. The blood should be illuminated through the smallest diameter CPB tube, using at least four distinct points around it, in only one cross section, because the blood is kept passing through the tube all the time and the whole volume will be illuminated.

Paper Details

Date Published: 22 February 2013
PDF: 8 pages
Proc. SPIE 8569, Mechanisms for Low-Light Therapy VIII, 856906 (22 February 2013); doi: 10.1117/12.2001538
Show Author Affiliations
Ana Carolina de Magalhães, Univ. de São Paulo (Brazil)
Elisabeth M. Yoshimura, Univ. de São Paulo (Brazil)

Published in SPIE Proceedings Vol. 8569:
Mechanisms for Low-Light Therapy VIII
Michael R. Hamblin; Juanita Anders; James D. Carroll; Praveen R. Arany, Editor(s)

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